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package com.sxt;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileDemo {
private static FileInputStream fileInputStream;

@SuppressWarnings("resource")
public static void main(String[] args) throws IOException {
    //创建一个文件
    File f = new File("d:/我的青春谁做主.txt");
    FileOutputStream fos = new FileOutputStream(f);
    String a="周杰伦";
    fos.write(a.getBytes());
    fos.close();
    //读出来
    File f1 = new File("d:/我的青春谁做主.txt");
    FileInputStream fis = new FileInputStream(f1);
    //创建一个文件夹
    File f2 = new File("G:/myfile");
    if(!f2.exists()){
        f2.mkdirs();
    }
    //创建一个文件
    File f3 = new File("G:/myfile/myprimr.txt");
    if (!f3.exists()) {
        f3.createNewFile();
    }
    FileOutputStream fos1 = new FileOutputStream(f3);
    int len=0;
    byte b[]=new byte[1024];
    while ((len=(fis.read(b)))!=-1) {
        fos1.write(b);
    }
    fos1.close();
    fis.close();
}

}